Valve.



Patented Oct. l4 I902. H. E. 'KEYES.

V A LV E.

(Applicatigin filed June 18, 1909.)

("0 Model.)

I Mg e S f: Ma

UNiTED STATES PATENT OFFICE.

HARRY E. KEYES, OF HOMESTEAD, PENNSYLVANIA, ASSIGNOR TO KEY- STONE VALVE AND MANUFAOTURING COMPANY, OF PITTSBURG, PENN- SYLVANIA, A CORPORATION OF PENNSYLVANIA.

VALVE.

SPECIFICATION forming part of Letters Patent No. 711,216, dated October 14, 1902.

Application filed June 18,1902. Serial No. 112,186. (No model.)

To all whom, it may concern: and a which communicate with a tapered Beitknown that I, HARRY E. KEYES, aciti- Valve-seat B. Within said seat is a tapered zen of the United States, residing at I-Iomevalve-plug O, ported, as at c,so that ports a stead, in the county of Allegheny and State and a or a and a maybe placed in commu- 5 of Pennsylvania, have invented new and usenication by the rotation of the plug, as will ful Improvements in Valves, of which the folbe readily understood. It the valve is to be lowing is a specification. a four-way valve, the casing A must be pro- My invention relates to means for limiting vided with an additional port and the plug the movements and assuring a proper seating O correspondingly ported, as will be under- [0 of a rotary valve-plug of a three or four way stood. The valve-plug is rotated by means valve; and, broadly stated, said invention of a stern D, which projects through a cap or consists in providing such a valve with a pair cover E, screwed upon or otherwise secured of valve-seating devices which are moved in to the casing A, said cover being provided opposite directions by the rotation of the with aneck surroundingthestem D,and said :5 valve-plug for alternately bearing upon the neck is supplied with a gland e, which is same and forcing it to its seat, according to packed in the usual manner for assuring a the direction in which said plug is rotated. tightjoint around the valve-stem. The valve- In United States Letters Patent issued to stem may be formed integral with the valve- .myself and W. Gluck November 10, 1897, plug, or it may be detachable therefrom, so

20 No. 593,587, a two-way valve is shown and that it may be readily replaced in caseof described which is provided with a single breakage without the necessity of also revalve -seating device movable toward and moving and replacing the valve-plug. As from the valve-plug by the rotation of the shown in Fig. 1, that portion of the valvevalve-stem to force the valve-plug to its seat stem (1 which is within the casing is square 25 when the valve-ports are closed and to rein cross-section, and the lower end thereof move the pressure thereon when said plug is rests in a square hole 01 in the valve-plug, rotated for opening said ports. My present (indicated in dotted linesin Fig. 1,) the valveinvention involves the use of a pair of such stem acting as a key-wrench in rotating devices organized to be moved in opposite the valve-plug, as will be readilyunderstood.

3o directions by the rotation of the valve or The stem is prevented from being withdrawn 8o valve-stem, so that said valve will be first refrom the casing and from its seat in the valveleased from pressure and then forced to its plug by a shoulder d at the junction of the seat regardless of the direction in which it square and round portions of the stem,which may be rotated. prevents the latter from being drawn up 5 To more particularly describe my inventhrough the cap or cover E. tion, I will refer to the accompanying draw- In the space between the upper surface of ings, in whichthe valve-plug and the under surface of the Figurelisacentral vertical section through cap or cover E are located two valve-seating the casing of a three-way valve embodying devices F and G, which in combination with 40 my invention. Fig. 2 is a top view of the the valve-plug embody my invention. So far same with the cap or cover removed. Fig. 3 is as the main feature of my invention is cona sectional view thereof, taken on line :r 00 of cerned itis immaterial how these devices may Fig. 1; and Fig. 4 illustrates one of thevalvebe constructed, so long as they are movable seating devices in top and edge views. in opposite directions by the rotation of the 5 The valvecasing A may he of any design valve or valve-stein for alternately forcing 5 suitable for a three or four way valve, my in? the valve-plug to its seat, according to the vention being equally applicable to both direction in which said plug is rotated. As. types of rotary plug-valves. The casing illusillustrated in the drawings, the devices F and trated is designed for a three-way valve and Gr consist of circular blocks or disks, which 50 is therefore provided with three ports a, a, are screw-threaded on their peripheral sur- Ioo faces to engage threaded portions of the valvecasing, and each block is provided with screws, the ends of which afford adjustable bearing-surfaces for contact with the upper surface of the valve-plug. The block or disk f of the device F is provided in its peripheral edge with a left-hand screw-thread f, which engages a similar thread f around the inner surface of the casing A. Tapped into said block are two screws f f which when the block is rotated in the direction which will force it toward the valve-plug will bear down upon the upper surface of the plug and force it to its seat. Through the center of the block is a square opening f for the square portion of the valve-stem, said stem acting to rotate said block while permitting it to be moved by its screw-thread toward or from the valve-plug, according to the direction of rotation.

The device G is the same in structure as the device F, except that its block or disk 9 is provided with a right-hand screw-thread g instead of a left-hand screw-thread and is made slightly smaller in diameter to facilitate the cutting of its cooperating thread 9 on the inner surface of the valve-casing. Said block is similarly provided with a central square opening g for the square portion of the Valvestem and with two screws 9 g which afford adjustable contacts for forcing the valve-plu g to its seat. The block 9 of the device G is provided with two holes g g for the passage of the screws f f of the device F toward and from the valve-plug, and block f is similarly provided with holes f f for the passage of screws 9 g and for afiording access thereto for purposes of adjustment.

It will now be understood that if the Valvestem be rotated to the left for placing ports a, and a in communication by way of port a through the valve-plug the devices F and G will be rotated together by the valve-stem. Device G will, however, be moved by its right-hand screw-thread away from contact with the valve-plug for removing the pressure thereon, and device F will be moved by its left-hand screw-thread into contact with the plug for forcing it to its seat, and that by a reverse movement'of the stem a re verse action will take placet'. 6., the device F will first release its pressure on the valve, which will again be forced to its seat by the device G.

The screws f f and g 9 which afford the adjustable contacts for the two devices, are initially adjusted, so that sufficient pressure will be applied to the plug at the proper movement to prevent its being rotated beyond the point at which its ports are properly registered with the ports in the valve-casing. Any wear between the valve and its seat may be readily taken up by readjusting said screws, as will be readily understood.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination substantially as hereinbefore described, of a valve-casing having a tapered valve-seat and three" or'more ports communicating therewith, a rotary valveplug seated therein and ported to register with the ports in said casing, and a pair of valve-seating devices which are moved in opposite directions by the rotation of said plug for alternately bearing upon the same according to the direction of rotation thereof.

2. The combination substantially as hereinbefore described, of a valve-casing having a tapered valve-seat and three or more ports communicating therewith, a rotary valveplug seated therein and ported to register with the ports in said casing, a valve-stem for rotating said plug, and a pair of valveseating devices which are moved in opposite directions toward and from said plug by the rotation of said stem and adapted to alternately bear upon said plug for forcing it to its seat according to the direction of rotation of said stem.

3. The combination substantially as hereinbefore described, of a valve-casing having a tapered valve-seat and three or more ports communicating therewith, a rotary valveplug seated therein and ported to register with the ports in said casing, a pair of valveseating devices consisting of a pair of oppositely-screw-threaded blocks or disks provided with contacts for forcing said plug to its seat, cooperating screw-threads on the inner surface of the valve-casing and means for causing said blocks to be rotated with said plug.

4. The combination substantially as hereinbefore described, of a valve-casing having a tapered valve-seat and three or more portscommunicating therewith, a rotary valveplug seated therein and ported to register with the ports in said casing, a pair of valveseating devices consisting of a pair of oppositely-screw-threaded blocks or disks provided with adjustable contacts for forcing said plug to its seat, cooperating screw-threads on the inner surface of the valve-casing, and means for causing said blocks to be rotated with said plug.

5. The combination substantially as hereinbefore described, of a valve-casing having a tapered valve-seat and three or more ports communicating therewith, a rotary valveplug seated therein and ported to register with the ports in said casing, a valve-stem for rotating said plug, a pair of oppositelythreaded blocks or disks arranged one above the other above said plug, cooperating screwthreads on the inner surface of said casing, contacts carried by the upper block adapted to bear upon the valve-plug through openings in the lower block, similar contacts on the lower block, and means for causing said blocks to be rotated together by the rotation of said valve-stem.

6. The combination substantially as hereinbefore described, of a valve-casing having a tapered valve-seat and three or more ports communicating therewith, a rotary valveplug seated therein and ported to register I said last-mentioned contacts, and means for with the ports in said casing, a valve-stem for rotating" said plug, a pair of oppositelythreaded blocks or disks arranged one above the other above said plug, cooperating screwthreads on the inner surface of said casing, adjustable contacts carried by the upper block adapted to bear upon the valve-plug through openings in the lower block, similar adjustable contacts carried by the lower block, openings through the upper block in line with causing said biocksto be rotated together by the rotation of said valve-stem.

In testimony whereof I have hereunto set 15 my hand in presence of two subscribing Witnesses.

HARRY E. KEYES.

Witnesses:

AMELIA SUTTER, JOHN SANKEY. 

